Re: [Xen-devel] [PATCH RFC] xen/console: buffer and show origin of guest PV writes

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Aug 13, 2013 at 12:34:19PM -0400, Daniel De Graaf wrote:
> Guests other than domain 0 using the console output have previously been
> controlled by the VERBOSE define, but with no designation of which
> guest's output was on the console. This patch converts the HVM output
> buffering to be used by all domains, line buffering their output and
> prefixing it with the domain ID. This is especially useful for debugging
> stub domains during early boot.
> 
> Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
> 
> ---
> 
> A few questions for discussion (the reason this is an RFC):
> 
> 1. HVM guests' output is currently limited to printable characters; do
> we want to implement the same restriction on PV guests?
> 
> 2. The prefix on the serial console for PV output is "(XEN) d5: ", while
> HVM output is still "(XEN) HVM5: "; should these be made consistent?
> 
> 3. Should we change to allowing console output by default, since it is
> now controlled by log levels?
>

Also having timestamps before the log entries would be nice (like Linux has).. 

-- Pasi


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